From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934227AbZDBRZP (ORCPT ); Thu, 2 Apr 2009 13:25:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764411AbZDBRYa (ORCPT ); Thu, 2 Apr 2009 13:24:30 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:42798 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933093AbZDBRY1 (ORCPT ); Thu, 2 Apr 2009 13:24:27 -0400 Subject: Re: [Announce] 2.6.29-rt2 From: Will Schmidt Reply-To: will_schmidt@vnet.ibm.com To: Thomas Gleixner Cc: LKML , rt-users , Ingo Molnar , Steven Rostedt , Peter Zijlstra , Carsten Emde , Clark Williams , Frank Rowand , Robin Gareus , Gregory Haskins , Philippe Reynes , Fernando Lopez-Lezcano In-Reply-To: References: <1238688145.8813.16.camel@lexx> Content-Type: text/plain Organization: IBM Date: Thu, 02 Apr 2009 12:24:13 -0500 Message-Id: <1238693053.8813.27.camel@lexx> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2009-04-02 at 18:45 +0200, Thomas Gleixner wrote: > On Thu, 2 Apr 2009, Will Schmidt wrote: > > > On Thu, 2009-04-02 at 02:17 +0200, Thomas Gleixner wrote: > > > We are pleased to announce the next update to our new preempt-rt > > > series. > > > > > > - fix a fork/exit bug in the signal per task cache (/me puts on > > > a huge brown paper bag - Thanks to Phillipe Reynes and Will > > > Schmidt for reporting and testing) > > > > > > - fix a group scheduling migration accounting bug (decoded with > > > and fixed by Peter Zijlstra - reported by Robin Gareus) > > > > > > - tlb gather rework by Peter Zijlstra - Thanks Peter ! > > > > > > - the usual fixlets > > > > > > The tlb rework might be incomplete on some of the uncountable > > > incarnations of PowerPC and ARM platforms, so look out for wreckage > > > and keep the usual tools (fire-extinguishers, brooms, buckets etc.) > > > handy. > > > > I can confirm that the tlb rework does appear to be missing some parts > > for Power. (Using 2.6.29-rt3 on pseries ppc64) > > > > arch/powerpc/kernel/built-in.o:(.toc1+0x4d0): undefined reference to > > `per_cpu__ppc64_tlb_batch' > > <...> > > mm/built-in.o:(.toc1+0xed0): more undefined references to > > `per_cpu__ppc64_tlb_batch' follow > > > > Not clear to me if this is just missing a "DEFINE_PER_CPU_LOCKED" to > > replace the removed "DEFINE_PER_CPU", (similar to the prior RT patches), > > or if the tlb rework is more involved. So, I will patiently remain > > tuned in. :-) > > No, the DEFINE_PER_CPU was removed accidentaly. Should have stayed there > > Thanks, > > tglx Thanks for the quick respin. Panic during boot: Uniform Multi-Platform E-IDE driver ide-gd driver 1.18 ide-cd driver 5.00 mice: PS/2 mouse device common for all mice TCP cubic registered Initializing XFRM netlink socket NET: Registered protocol family 17 Freeing unused kernel memory: 292k freed Red Hat nash version 5.1.19.6 starting Mounting proc filesystem Mounting sysfs filesystem Creating /dev Unable to handle kernel paging request for instruction fetch Faulting instruction address: 0x00000c30 cpu 0x3: Vector: 400 (Instruction Access) at [c0000000e8203b00] pc: 0000000000000c30 lr: c0000000000b7d24: .rcu_process_callbacks+0xc0/0xec sp: c0000000e8203d80 msr: 8000000040009032 current = 0xc0000000e81ff0f0 paca = 0xc000000000663800 pid = 53, comm = sirq-rcu/3 enter ? for help [c0000000e8203d80] c0000000000b7d24 .rcu_process_callbacks+0xc0/0xec (unreliable) [c0000000e8203e10] c000000000070f48 .ksoftirqd+0x208/0x39c [c0000000e8203f00] c000000000085a34 .kthread+0x78/0xc4 [c0000000e8203f90] c000000000029818 .kernel_thread+0x54/0x70 3:mon> 3:mon> r R00 = c0000000e8480100 R16 = c000000000467280 R01 = c0000000e8203d80 R17 = c000000000465980 R02 = 000000000014ff97 R18 = 0000000000000000 R03 = c0000000e6b6b880 R19 = c0000000e8200000 R04 = 0000000000000001 R20 = c00000000065be58 R05 = c000000000663800 R21 = 0000000000000000 R06 = c0000000e8203cc8 R22 = 0000000000000003 R07 = 0000000000200200 R23 = 0000000000000003 R08 = 0000000000000001 R24 = c000000000663800 R09 = c0000000e6b60eb0 R25 = c000000000696f00 R10 = c000000000538280 R26 = c00000000079e620 R11 = 0000000000000001 R27 = 0000000000000100 R12 = 0000000084000082 R28 = 0000000000000001 R13 = c000000000663800 R29 = c00000000079ea28 R14 = 0000000000000000 R30 = c0000000005d1538 R15 = 0000000002100000 R31 = c0000000e8480100 pc = 0000000000000c30 lr = c0000000000b7d24 .rcu_process_callbacks+0xc0/0xec msr = 8000000040009032 cr = 24000088 ctr = 0000000000000c31 xer = 0000000020000004 trap = 400 > > -------- > > Index: linux-2.6-tip/arch/powerpc/mm/tlb_hash64.c > =================================================================== > --- linux-2.6-tip.orig/arch/powerpc/mm/tlb_hash64.c > +++ linux-2.6-tip/arch/powerpc/mm/tlb_hash64.c > @@ -32,6 +32,8 @@ > #include > #include > > +DEFINE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch); > + > /* > * A linux PTE was changed and the corresponding hash table entry > * neesd to be flushed. This function will either perform the flush